2. ( Test of Goodness of Fit - {` - test ! LINE of the questions on the Business WEEK 1995 Subscriber Study was , "When making* investment purchases , do you use full service or discount brokerage firms ?" Survey results showed that 264 respondents use full service brokerage firms only , 255 USE* discount brokerage firms only , and 2 24 use both full service and discount films . USE`` = 10 to determine whether there are any differences in preference among the three SERVICE Choices